Mitsubishi Heavy Industries SRK20ZJX-S Service Manual page 84

Error code
Remote controller:
None
1. Applicable model
All models
2. Error detection method
3. Condition of Error displayed
4. Presumable cause
• Misconnection or breakage of
connecting wires
• Blown fuse
• Faulty indoor control or
power PCB
• Broken harness
• Faulty outdoor control PCB
(Noise filter)
Note:
LED Green Red
Stays OFF Stays OFF
Indoor
(Power supply to indoor control PCB)
– Stays OFF
Outdoor
5. Troubleshooting
Diagnosis
Is
AC220/240V
detected between 1 and
2 on the terminal block
of indoor
unit?
YES
for 1-phase unit detected between
Are fuses
OK (F200, F201)?
check of resistance between
YES
(1)
Is DC5V
detected between -
of CNW2?
Note (1)
YES
Is JX1 open?
83
-
Content
Power supply system error
NO
Is
AC220/240V
NO
1 and 2 on the terminal
block of outdoor
unit?
YES
NO
Is the
NO
- of CNW0
OK?
YES
Is the
checked result
NO
of resistance of FM,
LM, etc
OK?
YES
NO
for GND
NO
YES
-
'10 • SCM-SM-094
Countermeasure
Defective outdoor control
PCB (Noise filter)
Misconnection or breakage
of connecting wires
Defective indoor control or
power PCB Replace.
Replace FM, LM, etc.
Replace fuse.
Defective indoor power
PCB Replace.
Open JX1.
Defective indoor control
PCB Replace.